<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>后盾人</title>
  </head>
  <body></body>
  <script>
    // let hd = Symbol("后盾人在线教程");
    // let edu = Symbol("网址是houdunren.com");
    // console.log(hd == edu);
    // hd.name = "后盾人";
    // console.log(hd.name);
    // console.log(hd.description);
    let cms = Symbol.for("hdcms");
    // let edu = Symbol.for("hdcms");
    // console.log(cms == edu);
    let houdunren = Symbol("houdunren");
    let houdunren2 = Symbol("houdunren");
    let houdunren3 = Symbol("houdunren");
    console.log(Symbol.keyFor(houdunren));
  </script>
</html>
